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Time: 2024-03-28T14:13:52Z
URL: http://scholar.google.com/scholar_lookup?title=The+hyperpolarization-activated+channel+HCN4+is+required+for+the+generation+of+pacemaker+action+potentials+in+the+embryonic+heart.&year=2003&author=Stieber&journal=Proc+Natl+Acad+Sci+U+S+A.&volume=100&issue=25&pages=15235-15240&doi=10.1073%2Fpnas.2434235100&pmid=14657344